0005-rs6000-Improve-.machine.patch 3.6 KB

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  1. From ca2c3a7d3db7a699c358d3408f820396dd536fc8 Mon Sep 17 00:00:00 2001
  2. From: Segher Boessenkool <segher@kernel.crashing.org>
  3. Date: Tue, 1 Mar 2022 17:04:29 +0000
  4. Subject: [PATCH] rs6000: Improve .machine
  5. This adds more correct .machine for most older CPUs. It should be
  6. conservative in the sense that everything we handled before we handle at
  7. least as well now. This does not yet revamp the server CPU handling, it
  8. is too risky at this point in time.
  9. Tested on powerpc64-linux {-m32,-m64}. Also manually tested with all
  10. -mcpu=, and the output of that passed through the GNU assembler.
  11. 2022-03-04 Segher Boessenkool <segher@kernel.crashing.org>
  12. * config/rs6000/rs6000.c (rs6000_machine_from_flags): Restructure a
  13. bit. Handle most older CPUs.
  14. (cherry picked from commit 77eccbf39ed55297802bb66dff5f62507a7239e3)
  15. (cherry picked from commit fc7e603edc67c66a14f893f3b5a0a34e7d26f77c)
  16. Signed-off-by: Romain Naour <romain.naour@gmail.com>
  17. ---
  18. gcc/config/rs6000/rs6000.c | 81 +++++++++++++++++++++++++-------------
  19. 1 file changed, 54 insertions(+), 27 deletions(-)
  20. diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
  21. index 0421dc7adb3..0a55c979c36 100644
  22. --- a/gcc/config/rs6000/rs6000.c
  23. +++ b/gcc/config/rs6000/rs6000.c
  24. @@ -5742,33 +5742,60 @@ const char *rs6000_machine;
  25. const char *
  26. rs6000_machine_from_flags (void)
  27. {
  28. - /* For some CPUs, the machine cannot be determined by ISA flags. We have to
  29. - check them first. */
  30. - switch (rs6000_cpu)
  31. - {
  32. - case PROCESSOR_PPC8540:
  33. - case PROCESSOR_PPC8548:
  34. - return "e500";
  35. -
  36. - case PROCESSOR_PPCE300C2:
  37. - case PROCESSOR_PPCE300C3:
  38. - return "e300";
  39. -
  40. - case PROCESSOR_PPCE500MC:
  41. - return "e500mc";
  42. -
  43. - case PROCESSOR_PPCE500MC64:
  44. - return "e500mc64";
  45. -
  46. - case PROCESSOR_PPCE5500:
  47. - return "e5500";
  48. -
  49. - case PROCESSOR_PPCE6500:
  50. - return "e6500";
  51. -
  52. - default:
  53. - break;
  54. - }
  55. + /* e300 and e500 */
  56. + if (rs6000_cpu == PROCESSOR_PPCE300C2 || rs6000_cpu == PROCESSOR_PPCE300C3)
  57. + return "e300";
  58. + if (rs6000_cpu == PROCESSOR_PPC8540 || rs6000_cpu == PROCESSOR_PPC8548)
  59. + return "e500";
  60. + if (rs6000_cpu == PROCESSOR_PPCE500MC)
  61. + return "e500mc";
  62. + if (rs6000_cpu == PROCESSOR_PPCE500MC64)
  63. + return "e500mc64";
  64. + if (rs6000_cpu == PROCESSOR_PPCE5500)
  65. + return "e5500";
  66. + if (rs6000_cpu == PROCESSOR_PPCE6500)
  67. + return "e6500";
  68. +
  69. + /* 400 series */
  70. + if (rs6000_cpu == PROCESSOR_PPC403)
  71. + return "\"403\"";
  72. + if (rs6000_cpu == PROCESSOR_PPC405)
  73. + return "\"405\"";
  74. + if (rs6000_cpu == PROCESSOR_PPC440)
  75. + return "\"440\"";
  76. + if (rs6000_cpu == PROCESSOR_PPC476)
  77. + return "\"476\"";
  78. +
  79. + /* A2 */
  80. + if (rs6000_cpu == PROCESSOR_PPCA2)
  81. + return "a2";
  82. +
  83. + /* Cell BE */
  84. + if (rs6000_cpu == PROCESSOR_CELL)
  85. + return "cell";
  86. +
  87. + /* Titan */
  88. + if (rs6000_cpu == PROCESSOR_TITAN)
  89. + return "titan";
  90. +
  91. + /* 500 series and 800 series */
  92. + if (rs6000_cpu == PROCESSOR_MPCCORE)
  93. + return "\"821\"";
  94. +
  95. + /* 600 series and 700 series, "classic" */
  96. + if (rs6000_cpu == PROCESSOR_PPC601 || rs6000_cpu == PROCESSOR_PPC603
  97. + || rs6000_cpu == PROCESSOR_PPC604 || rs6000_cpu == PROCESSOR_PPC604e
  98. + || rs6000_cpu == PROCESSOR_PPC750 || rs6000_cpu == PROCESSOR_POWERPC)
  99. + return "ppc";
  100. +
  101. + /* Classic with AltiVec, "G4" */
  102. + if (rs6000_cpu == PROCESSOR_PPC7400 || rs6000_cpu == PROCESSOR_PPC7450)
  103. + return "\"7450\"";
  104. +
  105. + /* The older 64-bit CPUs */
  106. + if (rs6000_cpu == PROCESSOR_PPC620 || rs6000_cpu == PROCESSOR_PPC630
  107. + || rs6000_cpu == PROCESSOR_RS64A || rs6000_cpu == PROCESSOR_POWERPC64)
  108. + return "ppc64";
  109. HOST_WIDE_INT flags = rs6000_isa_flags;
  110. --
  111. 2.34.3